Fastest memory that works in this?

Standard Memory 512 MB (removable)
Maximum Memory 2.0 GB (supports dual-channel)
Memory Expansion 2 sockets
Model Comments 533/667MHz FSB, Intel 945GM Chipset

667Mhz is maximum that i945GM chipset supports.

http://www.intel.com/products/chipsets/945gm/index.htm

Well, you can try installing a PC5300 667mhz. DIMM and see if the BIOS will pick it uo and run it at 667mhz. I doubt the BIOS will have any manual adjustment to accompolish the higher RAM speed.

http://www.crucial.com/uk/store/li [...] +Pro+V3405

I installed some crucial notebook memory in a system the other day and it work perfectly. Crucial should do you well. Just add a Crucial 533mhz. 512MB to what came with the system, that's what I did except I was working with PC2700. 8)

CAS 4 would be high performance, CAS 5 works fine too. It looks like 533 mhz. is the max RAM speed for the system. The Crucial 533 mhz. would probably work well in there. Maybe just add a 512MB 533mhz. DIMM to what came with the sysrtem (a 512 MB 533 mhz. DIMM?). 512mb to 1GB upgrade is the move to make on a non gaming XP machine. 2 GB for a gaming-type XP machine is preferred.

So you are 100% sure ddr2 533 is the fastest memory that will work in that system? Very very sure?

Well, I think wazzUK is posting the specs for a 945G micro board (i have one) and that chipset runs 667 mhz. RAM, but not PC6400. I think your ystem will run 533nhz. max RAM speed with not adjustment for higher speed in BIOS.

I would do a little more searching about your specific system or even send the Mfg. support or Crucial support an email and ask. If you purchase Crucial PC5300 667. mhz. memory and install it I think it will fine, but it will run at 533mhz.

Well of course it will be fine, but will it run at that specified speed?

I can't find any Crucial 2X1 gb kits that have 4 latency and run at 667 mhz on newegg...

http://www.newegg.com/Product/Prod [...] (PC2+5300)

Alright good good. He's using vista too...and he has 1 gb at the moment. I'm guessing 2 gb running at a higher speed with lower latency will really improve performance, don't you?

I would be interested to know. If the systen runs the new RAM at 667 mhz. let us know.

Here is Corsair's recommendation when you punch in your system. I do not understand why PC5300 667mhz. DIMMs are not listed. maybe the vltage regulator will not support higher voltage DDR2 PC5300?

http://www.corsair.com/configurato [...] x?id=61826

Yeh init lol.... i thought i was going mad lol....

i already got me certificate from st.crispins (UK Mental health hospital) verifying that im SANE...... hehehe

I see. Pardon me, my right eye seems to be missing! Iused my working eye to decipher the 945G'M' has to mean mobile. Too much Viagra! Gotta run. The Escort Service just knocked on the door. 8)